This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A263125 #4 Oct 10 2015 07:14:05 %S A263125 14,36,168,912,52446,502800,5950176,79674864,1150876510,15833668596, %T A263125 219803283432,3071596572336,43104942680030,602744107942848, %U A263125 8433329018112000,118048179597057360,1652891095755395934 %N A263125 Number of (1+3)X(n+3) 0..1 arrays with each row divisible by 15 and column not divisible by 15, read as a binary number with top and left being the most significant bits. %C A263125 Row 1 of A263124. %H A263125 R. H. Hardin, <a href="/A263125/b263125.txt">Table of n, a(n) for n = 1..210</a> %e A263125 Some solutions for n=4 %e A263125 ..1..0..0..1..0..1..1....0..0..0..1..1..1..1....1..1..1..1..0..0..0 %e A263125 ..0..0..1..1..1..1..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0 %e A263125 ..0..0..0..0..0..0..0....1..0..0..1..0..1..1....1..1..0..1..0..0..1 %e A263125 ..0..1..1..1..1..0..0....0..1..1..1..1..0..0....0..0..1..1..1..1..0 %Y A263125 Cf. A263124. %K A263125 nonn %O A263125 1,1 %A A263125 _R. H. Hardin_, Oct 10 2015